The charitable fund has seen its assets surge in recent years, driven by the soaring value of Nvidia shares. It is estimated to be worth more than $9 billion.
Huang has yet to say he will comply with a committee's demand, a person familiar with that demand told the BBC. The public record does not set out what the committee asked him to do.
A company had been suspected of helping divert Nvidia chips to China. The evidence made public so far does not spell out how that suspicion connects to the reported communications.
Huang rescued Nvidia from bankruptcy on more than one occasion. He took risks on artificial intelligence long before much of the industry did, and helped build the infrastructure the sector now relies on.
The admission has left the billionaire in a personal scandal that has also been cast as a national security matter.
Nvidia has opened an independent investigation into the affair. The company is currently worth about $4 trillion and is one of the most valuable in the world.
In 2007, Huang and his wife founded the Jen-Hsun and Lori Huang Foundation.
He bet on AI at a time when"there were no customers for the stuff he was building,"Witt told the BBC.
Nvidia said it does not believe US national security had been compromised. It added that Huang is committed to continuing to lead the company.